ML20079J435
| ML20079J435 | |
| Person / Time | |
|---|---|
| Site: | 05000124 |
| Issue date: | 09/24/1982 |
| From: | VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIV., BLACKSB |
| To: | |
| Shared Package | |
| ML20079J414 | List: |
| References | |
| NUDOCS 8212280217 | |
| Download: ML20079J435 (4) | |
Text
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SAFETY SYSTEM Fi?NCTIONS f
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Current Technical Specifications without Changes .
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t Item Set Point Action. Bypass Provistops i No. Condition Detector _
Pission Chamber in e 3 cps Dump valve cannot May be bypassed by \f .
1 Neutron Count Rate be closed. If dump senior operator .; -
c Set Point Start-up Channel valve already closed, provided the Servo rod drive motors are Channel is fully inoperable until operative in the condition corrected. same range (; .1 watt)
Same as (1) May be bypassed for 2 Coolant-Moderator Sensor in Process 2 70*F a specific experi-Temperature , Set Pit ment with approval i Point of Rad. Safety Committee Same as (1); Sams as (2) - '
3 Coolant-Moderator Flow Orifice in g 3 gpm Annunciation Flow <, Set Point Process Pit
-- Same as (1) '4one l 4 Reactor Room Ventila- Relay tion Fan Off Not less than All control rod May be bypassed by ,.--.
Moderator-Coolant Pressure Sensor in senior operator S
Process Pit overflow pipe drives inoperable Operating Level ( Set level in core for control rod '
Point teoks tests with moderate f coolant dusped ask u - a.
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SAFETY SYSTEM FUNCTIONS [ \ \
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No. Condition Detector Set Point Action Bypass Provisions ?
1 Neutron Count Rate Pission Chamber in e 3 cps Dump valva cannot May be bypassed by V) ]
c Set Point Start-up channel be closed. If dump senior operator i valve already closed, provided the Servo rod drive actors are Channel is fully inoperable until operative in the condition corrected. same r3nge (; .1 watt) 2 Coolant-Moderator Sensor in Process a 70*F Same as (1) May be bypassed for a specific experi-Tem:perature ; Set Pit Point ment with approval of Rad. Safety Committee Flow detector, 1%
3 Coolant-Moderator accuracy minimum , 3 gpm .
Same as (1); Same as (2) ,
Flov <, Set Point ver the full scale Annunciation range measured 4 Reactor Roon Ventila- Relay - Same as (1) lone tion Fan Off 5 Moderator-coolant Pressure Sensor in Not less than All control rod May be bypassed by !
Operating Lovel(Set Process Pit overflow pipe drives inoperable senior operator Point level in core for control rod tanka tests with moderate coolant dumped I
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4 Proposed Technical Specifications Prior to resired Change j d
TABLE I INSTRUMENT ARRAYS A. Measuring Channel No. Operable . Detector Function / Action Bypass Provisions Power Level (poser range) A minimum of 2 UCIC - None Power Level (int. range) channels operating CIC -
None Power Level (startup range) on scale above the Fission chamber -
None Power Level up ammeter startup range CIC - None Coolant Flow - -
Ultrasonic or flow -
None 1
orifice, D/P detector ,
Coolant Inlet Temp. 1 RTD -
None Coolant Outlet Temp. 1 RTD -
None Rod Position 1/ rod Potentiometer -
None /
B. Safety Channel 5'
, Power Level (power range) 2 UCIC Scram @ 5 125% None Power Level (int. range) 1 CIC Scram @ > 5 sec. period None
- Alarm @ > 10 sec. period None
- Moderator Level in core 1 Float switch Scram @ 5 1" from top None tanks of core tanks Manual Button 4 Contact in None switch Neutron Count Rate 1 Fission chamber Inhibit control rods & Interlock on dump closing of dump valve valve closing may
@ 5 2 CPS. If dump valve 'oe bypassed by a closed, inhibit control Senior Reactor rods Operator Reactor Room Ventilation Fan 1 Relay Same as neutron count rate None Coolant Flow 1 Ultrasonic or Same as neutron count May be bypassed for flow orifice, rate, if flow 1 15 GPM a specific experiment D/P DETECTOR alarm with approval of Reactor Safety Com-mittee Coolant inlet temp. 1 RTD Same as neutron count rate Same as above if temp. 5 70*F
, Dump Valve 1 Limit switch Inhibit control rods if None not fully closed
TABLE I INSTRUMENT ARRAYS A. Measuring Channel No. Operable . Detector Function / Action Bypass Provisions
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Power Level (power range) IA minimum of 2 UCIC - None Power Level (int. range) channels operating CIC - None Power Level (startup range) on scale above the Fission chamber -
None Power Level pp ammeter startup ranste CIC -
None Coolant Flow - - Flow detector, 1% -
None 1
accuracy minimum, over the full kiE ""' d" #1 None Coolant Inlet Temp. 1 -
Coolant Outlet Temp. 1 RTD -
None Rod Position 1/ rod Potentiometer -
None B. Safety Channel ln
, Power Level (power range) 2 UCIC Scram @ 5 125% None Power Level (int. range) 1 CIC Scram @ > 5 sec. period None Alarm @ > 10 sec. period None i Moderator Level in core 1 Float switch Scram @31"fromtop None tanks of core tanks Manual Button 4 Contact in None switch j Neutron Count Rate 1 Fission chamber Inhibit control rods & Interlock on dump (
closing of dump valve valve closing may
@ 1 2 CPS. If dump valve be bypassed by a closed, inhibit control Senior Reactor rods Operator Reactor Room Ventilation Fan 1 Relay Same as neutron count rate gone Coolant Flow 1 Flow detector,1% Same as neutron count May be bypassed for accuracy minimum, rate, if flow 1 15 GPM a specific experiment over the full alarm with approval of scale range Reacto'r Safety Com-measured mittee Coolant inlet temp. 1 RTD Same as neutron count rate Same as above
'. if temp. I 70*F
. Dump Valve 1 Limit switch Inhibit control rods if None not fully closed O O O
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